Type-writing machine.



Patented Apr. 29, I902.

H. s. SHAFEBQ TYPE WRITING MACHINE.

(Application filed. Dec. 7, 1901.;

(No Model.)

- UNITED STATES PATENT OFFICE.

HOWARD S. SHAFER, OF NAZARETH, PENNSYLVANIA.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 698,864, dated April 29, 1902.

Application filed December 7, 1901. $615M 1 N modem To all whom it may concern:

Be it known that I, HOWARD S. SHAFER, a citizen of the United States, residing at Nazareth, in the county of Northampton and State of Pennsylvania, have invented new anduseful Improvements in Type-Nriting Machines, of which the following is a specification.

My invention relates to type-writing machines, and has for its object a device for turning the platen-roll in spacing and for returning the carriage to its initial position or any intermediate point.

The novel construction used by me is described in this specification and claimed, and illustrated in the accompanying drawings, forming a part thereof, in which I Figure 1 is a side elevation of a fragment of the carriage and platen with my device mounted thereon. Fig. 2 is a detail of the bell-crank lever and a fragment of the platen. Fig. 3 is a detail perspective of the drum and idler. Fig. 4 is a side elevation of the bellcrank lever and adjustable stop. Fig. 5 shows a modified form of pawl and ratchet.

Like numerals of reference denote like parts in the different views of the drawings.

The numeral 1 designates a platen mounted on a carriage 2, running on a track 3 and provided with a ratchet-bar 4. Mounted on the end of the platen 1 is a ratchet 5, having teeth 5 on its periphery. A spring-actuated pawl 6, carried by the long arm 7 of a bellcrank lever 7, is positioned to engage the teeth 5. The bell-crank lever 7 has a short arm 7 and is fulcrumed in a chair 8, mounted on a bar 9, forming a part of the frame of the carriage 2. Connected to the short arm 7 of the lever 7 is a metal ribbon-belt 10, which is attached at its other end to acrankarm carried by the upper end of a vertical rock-shaft journaled in boxes 13, supported on the main frame 14 of the machine, distinct from the frame of the carriage 2, or on the desk supporting the machine. The shaft 12 extends down below the base of the machine and bears an arm 15, located in position to be engaged by the right knee of the operator.

To hold the belt 10 up, a sheave 16 is provided, which is supported by an arm 17, secured to the frame of the machine. An idler 18, mounted above the sheave 16, serves to keep the belt 10 in place.

7 To regulate the throw of the lever 7 to pro vide for single or double spacing, an adj ustable stop 19 is provided, which 'is slidingly mounted between the arms 8 of the chair 8. This stop 19 carries a lug 20, which can be set to beengaged by either of two pins 21 or 22, carried by the long arm 7" of the lever 7. When the lug 17 is set to be engaged by the pin 21, the lever 7 can be given a throw equal to two spaces, and when the lug 20 is set to be engaged by the pin 22 a throw corresponding to but one space is possible.

In the modified form shown in Fig. 5 a ratchet 23, having teeth on the face thereof, is employed in combination with a spring pawl 24.

In operation the arm 15 is engaged-by the right knee and the rock-shaft 12 operated to actuate the lever 7 and revolve the platen 1 either one or two spaces, depending on the adjustment of the stop 19, and haul the carriage back to the required position.

I do not wish to be limited as to details of construction, as these may be modified in many particulars Without departing from the spirit ofmy invention.

Having thus described my invention, what I claim, and wish to secure by Letters Patent,

1. In acarriage-return mechanism,the combination with a carriage, of a revoluble platen bearing a ratchet, a bell-crank lever mounted on said carriage and carrying a pawl pivoted to one arm thereof and located to engage said ratchet, a belt attached to the other arm of said lever, and means constructed to be actuated by one knee of the operator to pull said belt to operate said lever to return said carriage, substantially as described.

2. In a carriage-return mechanism,the combination with a carriage, of a revoluble platen bearing a ratchet-wheel, a bell-crank lever mounted on said carriage and bearing a pawl on one arm located to engage said ratchet, a belt connected to the other arm, a rock-shaft connected to said belt, and an arm on said rock-shaft positioned to be engaged by one knee of the operator to actuate said shaft to turn said platen and return the carriage, substantially as described.

3. In a carriage-return mechanism,the combination with a carriage, of a revoluble platen bearing a ratchet, a hell-crank lever mounted on said carriage and bearing on one arm a pawl located to engage'said ratchet, a belt connected to the other arm of said lever, a sheave mounted on the frame of the 1nachine and located to engage said belt to hold it in line, and means for pulling said belt to return said carriage, substantially as described.

4. In a carriage-return mechanisrn,the combination with a carriage, of a revoluble platen bearing a ratchet, a bell-crank lever bearinga pawl pivoted to one arm thereof and engaging said'ratchet, an adjustable stop mounted to engage said lever to control the throw thereof, and means connected to the otherarm of said lever to operate it to revolve said platen and return said carriage, substantially as described.

HOWARD S. SHAFER.

Witnesses: v

AUGUSTUS SAUssER, FRANK RIEDER, Jr. 

